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Virtuozzo (formerly Parallels Cloud Server) 6.0 Update 9 (6.0.9-2806)

Last Updated: Aug 02, 2016 01:39PM UTC

Issue date: 2015-03-19

1. What's Included in This Update

The new packages for Virtuozzo (formerly Parallels Cloud Server) 6.0 introduce new features and provide stability and usability fixes for virtual machine and Container management tools and Virtuozzo storage.

2. New Features

Support for Docker inside Virtuozzo containers (#PSBM-29806). You can now create and run Docker containers inside Virtuozzo containers based on supported OS EZ templates (CentOS 7 and Fedora 21).

Improved Virtuozzo storage I/O latency monitoring (#PSBM-31580, #PSBM-31839). The 'pstorage mnt-top command' provides new latency monitoring and shows network statistics and disk latencies for CS communications. The command lets users identify Chunk Servers and Nodes with the highest latencies and thus helps eliminate weaknesses in the data chain. The 'pstorage mnt-top' command shows average and top latencies as well as unaligned I/O statistics to help users identify files and virtual environments generating unaligned I/O. If a Virtuozzo storage I/O request is frozen for more than 7 seconds, a message about is added to '/var/log/messages'.

3. Bug Fixes

Invalid unlicensed space in pstorage stat. (#PSBM-29353)

The '-i' option was not ignored in 'pstorage make-mds -I -i' commands. (#PSBM-30139)

Parsing of listening address for 'make-cs' and 'configure-cs' commands did not work. (#PSBM-30144)

P2V migration of Ubuntu could fail because of failed GRUB detection. (#PSBM-30487)

Under certain circumstances, use of an e1000 network adapter in a Windows virtual machine could lead to kernel panic. (#PSBM-30624)

4. Known Issues

The 'prlctl' utility does not support some of the Container operations supported by 'vzctl' in the previous versions of Virtuozzo hypervisor. To perform such operations, use the 'vzctl' utility instead of 'prlctl'.

The offline management feature does not work for Containers operating in the bridged networking mode. For details, see the KB article at /en/111356.

The offline management feature might not work for running virtual machines that operate in the bridged networking mode. The reason for this is that the destination MAC address in incoming offline management packets is changed when the packets are processed on the Virtuozzo server. As a result, the processed packets contain a source MAC address different from the destination one in incoming packets and might be dropped by your router. To solve the problem, reconfigure the router to accept packets with the same IP address but different MAC addresses. As an alternative, you can set the network adapter of a virtual machine to operate in the host-routed mode.

Online migration of CT running Docker Containers is not possible.

Setting encrypted passwords for containers that run Ubuntu 10.04 is not supported. To work around the problem, set the password in plain text. For more details, see /en/114759 (#PSBM-14886).

Cannot establish IPsec connections from Virtuozzo Hardware Node to Containers. For more information, see /120008.

Containers with multiple virtual hard disks cannot be backed up or restored via Virtual Automation or using the 'vzabackup'/'vzarestore' commands.

An issue in the e1000 network driver may cause network on Windows Server 2012 R2 Update 1 virtual machines to stop working. For more details, see /en/123253.

Converting a Hyper-V virtual machine to a Odin virtual machine may fail. To work around the problem, use the '--allow-no-os' option when converting the virtual machine. (#PSBM-7201)

Creating a virtual machine in Virtuozzo 6.0 set up in a Parallels Desktop for Mac virtual machine may take a long time. (#PSBM-8528)

Using the WMI console is not supported in Windows virtual machines that you enter with the 'prlctl enter' command. For more information on how to work around the problem, see /en/114766. (#PSBM-9811)

A Linux virtual machine with less than 4 GB of RAM may hang on startup. To work around the problem, use the 'iommu=soft' option when booting the virtual machine. For details, see /en/114764. (#PSBM-11807)

Creating snapshots of a Container that has at least one 'prlctl enter' or 'prlctl exec' session open is not supported. To make a snapshot, close the open sessions first. (#PSBM-11871)

Virtuozzo may freeze a Container trying to consume more disk space than you allocated to it. To solve the problem, increase the amount of disk space for the affected Container. (#PSBM-12213)

The Bash 'echo' command does not report an error when trying to write to a file located on a Virtuozzo storage cluster, even if the cluster does not have enough free space. (#PSBM-12621)

Soft lockups in the Linux kernel, up to version 2.6.37, may occur on stopping virtual machines. For more information, see /en/114761. (#PSBM-13963)

Traffic shaping may not work for bridged virtual network adapters on physical servers with Open vSwitch enabled. (#PSBM-14260)

It is impossible to use the iptables functionality on physical servers with Open vSwitch bridges enabled. (#PSBM-14334)

On systems upgraded from Virtuozzo hypervisor to Virtuozzo 6.0, 'prlctl list –a' may not show the IP addresses of container-bridged network adapters. To view such IP addresses, use the 'vzlist –o IP' command. (#PSBM-14528)

Running virtual machines with Windows Server 2012 and Windows 8 is supported only on servers that have CPUs with the NX (No-eXecute) feature enabled. For details, see /en/114760. (#PSBM-14837)

Backing up a virtual machine with large virtual disks stored on an LVM partition may take a long time. (#PSBM-14971)

Running the Iometer tool in a virtual machine with Windows and a small amount of RAM may cause the virtual machine to crash. To work around the problem, increase the amount of RAM or swap allocated to the virtual machine. (#PSBM-15403)

The ebtables rules are flushed after restarting the ebtables service. (#PSBM-15641)

Creating a cache with updates may fail for containers that run Red Hat Enterprise Linux 5. (#PSBM-15707)

C2V migration from Virtuozzo containers for Windows to Virtuozzo is very slow. (#PSBM-19258)

Cannot migrate a Container with over 2TB of data to a virtual machine. (#PSBM-21613)